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Shelly, Gary B., Cashman, Thomas J., and Serwatka, Judy A. (2004). Business Data Communications, Introductory Concepts and Techniques, Fourth Edition. Course Technology.
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Shelly, Gary B., Cashman, Thomas J., and Serwatka, Judy A. (2000). Business Data Communications, Introductory Concepts and Techniques, Third Edition. Course Technoloy.
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Shelly, Gary B., Cashman, Thomas J., and Serwatka, Judy A. (1998). Business Data Communications, Second Edition. Course Technology.
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Shelly, Gary B., Cashman, Thomas J., Hill, Judy A. (1995). Business Data Communications: Introductory Concepts and Techniques. Boyd and Fraser publishing.
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